Test-RegKey.ps1
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function Test-RegKey { <# .SYNOPSIS Determines if a registry key exists. .DESCRIPTION Use Test-RegKey to determine if a registry key exists. .PARAMETER ComputerName An array of computer names. The default is the local computer. .PARAMETER Hive The HKEY to open, from the RegistryHive enumeration. The default is 'LocalMachine'. Possible values: - ClassesRoot - CurrentUser - LocalMachine - Users - PerformanceData - CurrentConfig - DynData .PARAMETER Key The path of the registry key to open. .PARAMETER Ping Use ping to test if the machine is available before connecting to it. If the machine is not responding to the test a warning message is output. .PARAMETER PassThru Passes the registry key, if found. .EXAMPLE $Key = "SOFTWARE\MyCompany" Test-RegKey -ComputerName SERVER1 -Key $Key True Description ----------- The command checks if the MyCompany key exists on SERVER1. If the Value was found the result is True, else False. .EXAMPLE Get-Content servers.txt | Test-RegValue -Key $Key -PassThru ComputerName Hive Key Value Data Type ------------ ---- --- ----- ---- ---- SERVER1 LocalMachine SOFTWARE\Microsof... PowerShellVersion 1.0 String SERVER2 LocalMachine SOFTWARE\Microsof... PowerShellVersion 1.0 String SERVER3 LocalMachine SOFTWARE\Microsof... PowerShellVersion 1.0 String Description ----------- The command uses the Get-Content cmdlet to get the server names from a text file. The computer names are piped into Test-RegValue. If the Value was found and PassThru is specidied, the result is the registry value custom object. .OUTPUTS System.Boolean PSFanatic.Registry.RegistryValue (PSCustomObject) .NOTES Author: Shay Levy Blog : http://blogs.microsoft.co.il/blogs/ScriptFanatic/ .LINK http://code.msdn.microsoft.com/PSRemoteRegistry .LINK Get-RegKey New-RegKey Remove-RegKey #> [OutputType('System.Boolean','PSFanatic.Registry.RegistryValue')] [CmdletBinding(DefaultParameterSetName="__AllParameterSets")] param( [Parameter( Position=0, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true, HelpMessage="An array of computer names. The default is the local computer." )] [Alias("CN","__SERVER","IPAddress")] [string[]]$ComputerName="", [Parameter( Position=1, ValueFromPipelineByPropertyName=$true, HelpMessage="The HKEY to open, from the RegistryHive enumeration. The default is 'LocalMachine'." )] [ValidateSet("ClassesRoot","CurrentUser","LocalMachine","Users","PerformanceData","CurrentConfig","DynData")] [string]$Hive="LocalMachine", [Parameter( Mandatory=$true, Position=2, ValueFromPipelineByPropertyName=$true, HelpMessage="The path of the subkey to open." )] [string]$Key, [switch]$Ping, [switch]$PassThru ) process { Write-Verbose "Enter process block..." foreach($c in $ComputerName) { try { if($c -eq "") { $c=$env:COMPUTERNAME Write-Verbose "Parameter [ComputerName] is not present, setting its value to local computer name: [$c]." } if($Ping) { Write-Verbose "Parameter [Ping] is present, initiating Ping test" if( !(Test-Connection -ComputerName $c -Count 1 -Quiet)) { Write-Warning "[$c] doesn't respond to ping." return } } Write-Verbose "Starting remote registry connection against: [$c]." Write-Verbose "Registry Hive is: [$Hive]." $reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey([Microsoft.Win32.RegistryHive]$Hive,$c) Write-Verbose "Open remote subkey: [$Key]" $subKey = $reg.OpenSubKey($Key) if($subKey) { Write-Verbose "Registry sub key: $subKey has been found" if($PassThru) { Write-Verbose "Parameter [PassThru] is present, creating PSFanatic registry custom objects." Write-Verbose "Create PSFanatic registry key custom object." $pso = New-Object PSObject -Property @{ ComputerName=$c Hive=$Hive Key=$Key SubKeyCount=$subKey.SubKeyCount ValueCount=$subKey.ValueCount } Write-Verbose "Adding format type name to custom object." $pso.PSTypeNames.Clear() $pso.PSTypeNames.Add('PSFanatic.Registry.RegistryKey') $pso } else { $true } } else { Write-Verbose "Registry sub key: $subKey cannot be found" $false } Write-Verbose "Closing remote registry connection on: [$c]." $subKey.close() } catch { #Write-Error $_ } } Write-Verbose "Exit process block..." } } |